Question

the simplest way to go about this...(equation in comments)

Answer 1

\[(x^2-5)^2+2(x^2-5)=-1\]

Answer 2

Let \(t = x^2-5\)
\(t^2+2t+1 = 0 \\
(t+1)^2 = 0 \\
t = -1 \\
x^2-5 = -1 \\
x^2 = 4 \\
x = \pm2
\)

Answer 3

yes.... :)